Remove the rear timing chain case bolts. Loosen in numerical order as shown in the figure.

Fig. Rear timing case loosening sequence-3.5L engine

Remove the rear timing chain case.

Remove the O-rings to cylinder head.

Remove the O-rings to cylinder block.

Remove the intake valve timing control solenoid valves.

Remove the intake and exhaust camshafts and camshaft brackets. Equally loosen camshaft bracket bolts in several steps in the numerical order shown in the figure. For reinstallation, be sure to put marks on camshaft bracket before removal.

Fig. Right camshaft loosening sequence-3.5L engine

Fig. Left camshaft loosening sequence-3.5L engine

Remove the RH and LH camshaft chain tensioners from cylinder head.

Remove the cylinder head bolts. Cylinder head bolts should be loosened in two or three steps.

Remove the cylinder head.

To install:

Before installing rear timing chain case, remove old liquid gasket from mating surface using a scraper. Also remove old liquid gasket from mating surface of cylinder block. Remove old liquid gasket from the bolt hole and thread.

Before installing cam bracket, remove old liquid gasket from mating surface using a scraper.

Before installing the cylinder head gasket, be sure that No. 1 cylinder is at TDC. At this time, the crankshaft key should face toward the right bank.

Install cylinder heads with new gaskets.

NOTE

Do not rotate crankshaft and camshaft separately, or valves will strike piston heads.

CAUTION

Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between d1 and d2 exceeds the limit, replace them with new ones. Limit (d1 - d2): 0.0043 in. Lubricate threads and seat surfaces of the bolts with new engine oil.

Fig. Head bolt checking-3.5L engine

Fig. Right cylinder head bolt torque sequence-3.5L and 4.0L engines

Fig. Left cylinder head bolt torque sequence-3.5L and 4.0L engines

Install cylinder head outside bolts Tighten in numerical order shown in the figure. Tightening procedure:

Before installing camshaft brackets, apply sealant to mating surface of No. 1 journal head. Use Genuine RTV silicone sealant or equivalent. Install camshaft brackets in their original positions. Align stamp mark as shown in the figure. If any part of valve assembly or camshaft is replaced, check valve clearance according to reference data. After completing assembly check valve clearance. Valve clearance (Cold):

NOTE

Lubricate threads and seat surfaces of camshaft bracket bolts with new engine oil before installing them.